Configuring the PA-4E

To continue your PA 4E port adapter installation, you must configure the 4E interfaces. The instructions that follow apply to all supported platforms. Minor differences between the platforms—with Cisco IOS software commands—are note.d This chapter contains the following sections:

Using the EXEC Command Interpreter

You modify the configuration of your router through the software command interpreter called the EXEC (also called enable mode). You must enter the privileged level of the EXEC command interpreter with the enable command before you can use the configure command to configure a new interface or change the existing configuration of an interface. The system prompts you for a password if one has been set.

The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket (>). At the console terminal, use the following procedure to enter the privileged level:

Step 1 At the user-level EXEC prompt, enter the enable command. The EXEC prompts you for a privileged-level password as follows:

Router> enable

Password:

Step 2 Enter the password (the password is case sensitive). For security purposes, the password is not displayed.

When you enter the correct password, the system displays the privileged-level system prompt (#):

Configuring the Interfaces

After you verify that the new PA-4E is installed correctly (the enabled LED goes on), use the privileged-level configure command to configure the new interfaces. Have the following information available:

•Protocols you plan to route on each new interface

•IP addresses, if you plan to configure the interfaces for IP routing

•Bridging protocols you plan to use

If you installed a new PA-4E or if you want to change the configuration of an existing interface, you must enter configuration mode to configure the new interfaces. If you replaced a PA-4E that was previously configured, the system recognizes the new interfaces and brings each of them up in their existing configuration.

You execute configuration commands from the privileged level of the EXEC command interpreter, which usually requires password access. Contact your system administrator, if necessary, to obtain password access. (See the "Using the EXEC Command Interpreter" section for an explanation of the privileged level of the EXEC.)

Note The 4E interfaces can be configured at 10 Mbps, full duplex (FDX), for a maximum aggregate bandwidth of 40 Mbps.

Shutting Down an Interface

Before you remove an interface that you will not replace, or replace port adapters, use the shutdown command to shut down (disable) the interfaces to prevent anomalies when you reinstall the new or reconfigured interface processor. When you shut down an interface, it is designated administratively down in the show command displays.

Step 2 At the privileged-level prompt, enter configuration mode and specify that the console terminal is the source of the configuration subcommands, as follows:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Step 3 Shut down interfaces by entering the interface ethernet subcommand (followed by the interface address of the interface), and then enter the shutdown command. Table 4-1 shows the command syntax.

When you have finished, press Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode and return to the EXEC command interpreter.

Table 4-1 Syntax of the shutdown Command

Platform

Command

Example

Catalyst RSM/VIP2 in Catalyst 5000 family switches

interface, followed by the type (ethernet) and slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 0.

Router(config-if)# interface ethernet 0/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 0/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco 7120 series routers

interface, followed by the type (ethernet) and slot/port (port-adapter-slot number/ interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 3.

Router(config-if)# interface ethernet 3/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 3/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco 7140 series routers

interface, followed by the type (ethernet) and slot/port (port-adapter-slot number/ interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 4.

Router(config-if)# interface ethernet 4/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 4/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco 7200 series routers

interface, followed by the type (ethernet) and slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 6.

Router(config-if)# interface ethernet 6/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 6/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco uBR7223 router

interface, followed by the type (ethernet) and slot/port (port-adapter-slot-number/interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 1.

Router(config-if)# interface ethernet 1/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 1/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco uBR7246 and Cisco uBR7246 VXR routers

interface, followed by the type (ethernet) and slot/port (port-adapter-slot-number/interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 2.

Router(config-if)# interface ethernet 2/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 2/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco 7301 routers

interface, followed by the type (ethernet) and slot/port (port-adapter-slot number/ interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 1.

Router(config-if)# interface ethernet 1/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 1/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

interface ethernet, followed by slot/port (module-slot-number/interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in a Cisco 7304 PCI Port Adapter Carrier Card in module slot 3 of a Cisco 7304 router.

Router(config-if)# interface ethernet 3/0
Router(config-if)# shutdown

Router(config-if)# interface ethernet 3/1

Router(config-if)# shutdown

Ctrl-Z

Router#

Cisco 7401ASR routers

interface, followed by the type (ethernet) and slot/port (port-adapter-slot number/ interface-port-number)

The example is for interface 0 and interface 1 on a port adapter in port adapter slot 1.

Router(config-if)# interface ethernet 1/0

Router(config-if)# shutdown

Router(config-if)# interface ethernet 1/1

Router(config-if)# shutdown

Ctrl-Z

Router#

VIP in Cisco 7000 series orCisco 7500 series routers

interface, followed by the type (ethernet) and slot/port adapter/port (interface-processor-slot-number/port-adapter-slot-number/interface-port-number)

The example is for interface 0 on a port adapter inport adapter slot 1 of a VIP installed in interface processor slot 1.

Router(config-if)# interface ethernet 1/1/1

Router(config-if)# shutdown

Router(config-if)# interface ethernet 1/1/0

Router(config-if)# shutdown

Ctrl-Z

Router#

Note If you need to shut down additional interfaces, enter the interface ethernet command (followed by the interface address of the interface) for each of the interfaces on your port adapter. Use the no shutdown command to enable the interface.

Step 4 Write the new configuration to NVRAM as follows:

Router# copy running-config startup-config

[OK]

Router#

The system displays an OK message when the configuration has been stored in NVRAM.

Step 5 Verify that new interfaces are now in the correct state (shut down) using the show interfaces command (followed by the interface type and interface address of the interface) to display the specific interface. Table 4-2 provides examples.

Table 4-2 Examples of the show interfaces Command

Platform

Command

Example

Catalyst RSM/VIP2 in Catalyst 5000 family switches

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces ethernet 1/0

Ethernet 1/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco 7120 series routers

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 3.

Router# show interfaces ethernet 13/0

Ethernet 3/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco 7140 series routers

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 4.

Router# show interfaces ethernet 4/0

Ethernet 4/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco 7200 series routers

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 6.

Router# show interfaces ethernet 6/0

Ethernet 6/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco uBR7223 router

show interfaces ethernet, followed by slot/port (port-adapter-slot- number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces ethernet 1/0

Ethernet 1/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco uBR7246 and Cisco uBR7246 VXR routers

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 2.

Router# show interfaces ethernet 2/0

Ethernet 2/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco 7301 routers

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces ethernet 1/0

Ethernet 1/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

show interfaces ethernet, followed by slot/port (module-slot-number/interface-port-number)

The example is for interface 0 on a port adapter in a Cisco 7304 PCI Port Adapter Carrier Card in module slot 3 of a Cisco 7304 router.

Router# show interfaces ethernet 3/0

Ethernet 3/0 is administratively down,
line protocol is down
[Additional display text omitted from
this example]

Cisco 7401ASR routers

show interfaces ethernet, followed by slot/port (port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces ethernet 1/0

Ethernet 1/0 is administratively down,
line protocol is down

[Additional display text omitted from
this example]

VIP in Cisco 7000 series or Cisco 7500 series routers

show interfaces ethernet, followed by slot/port adapter/port (interface-processor-slot-number/ port-adapter-slot-number/ interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1 of a VIP in interface processor slot 1.

Router# show interfaces ethernet 1/1/0

Ethernet 1/1/0 is administratively
down, line protocol is down

[Additional display text omitted from
this example]

Step 6 Reenable interfaces by doing the following:

a. Repeat Step 3 to reenable an interface. Substitute the no shutdown command for the shutdown command.

b. Repeat Step 4 to write the new configuration to memory. Use the copy running-config startup-config command.

c. Repeat Step 5 to verify that the interfaces are in the correct state. Use the show interfaces command followed by the interface type and interface address of the interface.

Performing a Basic Configuration

Following are instructions for a basic configuration: enabling an interface and specifying IP routing. You might also need to enter other configuration subcommands, depending on the requirements for your system configuration and the protocols you plan to route on the interface. For complete descriptions of configuration subcommands and the configuration options available for ethernet interfaces, refer to the appropriate software documentation.

In the following procedure, press the Return key after each step unless otherwise noted. At any time you can exit the privileged level and return to the user level by entering disable at the prompt as follows:

Router# disable

Router>

Step 1 Enter configuration mode and specify that the console terminal is the source of the configuration subcommands, as follows:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Step 2 Specify the first interface to configure by entering the interface ethernet subcommand, followed by the interface address of the interface you plan to configure. Table 4-3 gives examples.

Step 7 After including all of the configuration subcommands to complete your configuration, press Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode and return to the EXEC command interpreter prompt.

Step 8 Write the new configuration to NVRAM as follows:

Router# copy running-config startup-config

[OK]

Router#

This completes the procedure for creating a basic configuration.

Checking the Configuration

After configuring the new interface, use the show commands to display the status of the new interface or all interfaces, and use the ping and loopback commands to check connectivity. This section includes the following subsections:

Using show Commands to Verify the New Interface Status

Table 4-4 demonstrates how you can use the show commands to verify that new interfaces are configured and operating correctly and that the PA-4Eappears in them correctly. Sample displays of the output of selected show commands appear in the sections that follow. For complete command descriptions and examples, refer to the publications listed in the "Related Documentation" section on page viii.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

Table 4-4 Using show Commands

Command

Function

Example

show version orshow hardware

Displays system hardware configuration, the number of each interface type installed, Cisco IOS software version, names and sources of configuration files, and boot images

Router# show version

show controllers

Displays all the current interface processors and their interfaces

Router# show controllers

show diagslot

Note The slot argument is not required with Catalyst 5000 family switches.

Displays types of port adapters installed in your system and information about a specific port adapter slot, interface processor slot, or chassis slot

Router# show diag 2

show interfaces type 0 or 1/interface-port-number

Displays status information about a specific type of interface (for example, ethernet) on a Catalyst RSM/VIP2

Router# show interfacesethernet 1/0

show interfacestype 3/interface-port-number

Displays status information about a specific type of interface, for example, ethernet) in a Cisco 7120 series router.

Router# show interfaces ethernet 3/1

show interfaces type4/interface-port-number

Displays statue information about a specific type of interface (for example, ethernet) in a Cisco 7140 series router.

Displays protocols configured for the entire system and for specific interfaces

Router# show protocols

show running-config

Displays the running configuration file

Router# show running-config

show startup-config

Displays the configuration stored in NVRAM

Router# show startup-config

If an interface is shut down and you configured it as up, or if the displays indicate that the hardware is not functioning properly, ensure that the interface is properly connected and terminated. If you still have problems bringing up the interface, contact a service representative for assistance. This section includes the following subsections:

Using show version or show hardware Commands

Display the configuration of the system hardware, the number of each interface type installed, the Cisco IOS software version, the names and sources of configuration files, and the boot images, using the show version (or show hardware) command. The following examples show output for the show version command on some of the platforms that support the PA-4E.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches

Following is an example of the show version command from a Catalyst 5000 family switch with the PA-4E:

Router# show version

Cisco Internetwork Operating System Software

IOS (tm) C5RSM Software (C5RSM-JSV-M), Version 11.2(9)P

Copyright (c) 1986-1997 by cisco Systems, Inc.

Compiled Tue 24-Jun-97 17:09 by shj

Image text-base: 0x600108E0, data-base: 0x6095E000

ROM: System Bootstrap, Version 11.2(15707)

BOOTFLASH: C5RSM Software (C5RSM-JSV-M), Version 11.2

yosemite_3 uptime is 17 hours, 17 minutes

System restarted by reload

System image file is "dirt/yosemite/c5rsm-jsv-mz.7P", booted via tftp from 223.2

55.254.254

cisco RSP2 (R4700) processor with 32768K bytes of memory.

R4700 processor, Implementation 33, Revision 1.0

Last reset from power-on

G.703/E1 software, Version 1.0.

SuperLAT software copyright 1990 by Meridian Technology Corp).

Bridging software.

X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.

TN3270 Emulation software.

1 C5IP controller (15 Vlan).

1 VIP2 controller (4 Ethernet)(1 Fddi).

4 Ethernet/IEEE 802.3 interface(s)

15 Virtual Ethernet/IEEE 802.3 interface(s)

1 FDDI network interface(s)

123K bytes of non-volatile configuration memory.

16384K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).

8192K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x100

Router#

Cisco 7100 Series Routers

Following is an example of the show version command from a Cisco 7120 series router with the PA-4E:

Using the show diag Command

Display the types of port adapters installed in your system (and specific information about each) using the show diagslot command, where slot is the port adapter slot in a Cisco 7100 series, Cisco 7200 series Cisco uBR7200 series router, Cisco 7301 router, and a Cisco 7401ASR router, and the interface processor slot in a Cisco 7000 series or Cisco 7500 series router with a VIP. The following examples show output for the show diag command on some of the platforms that support the PA-4E.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

Note The slot argument is not required for Catalyst 5000 family switches.

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches

Following is an example of the show diag command that shows a PA-4E on a Catalyst RSM/VIP2:

Router# show diag

Slot 0:

Physical slot 0, ~physical slot 0xF, logical slot 0, CBus 1

Microcode Status 0x4

Master Enable, LED, WCS Loaded

Board is analyzed

Pending I/O Status: Console I/O, Debug I/O

EEPROM format version 1

C5IP controler, HW rev 1.0, board revision A0

Serial number: 00000001 Part number: 00-0000-01

Test history: 0x00 RMA number: 00-00-00

Flags: cisco 7000 board; 7500 compatible

EEPROM contents (hex):

0x20: 01 1C 01 00 00 00 00 01 00 00 00 01 00 00 00 00

0x30: 50 00 00 00 00 00 00 00 00 00 00 78 00 00 00 00

Slot database information:

Flags: 0x4 Insertion time: 0xFAC (17:24:40 ago)

Slot 7:

EEPROM format version 1

Route/Switch Processor 2, HW rev 1.0, board revision A0

Serial number: 00000001 Part number: 00-0000-01

Test history: 0x00 RMA number: 00-00-00

Flags: cisco 7000 board; 7500 compatible

EEPROM contents (hex):

0x20: 01 1C 01 00 00 00 00 01 00 00 00 01 00 00 00 00

0x30: 50 00 00 00 00 00 00 00 00 00 00 78 00 00 00 00

Cisco 7100 Series Router

Following is an example of the show diagslot command that shows a PA-4E in port adapter slot 3 of a cisco 7120 series router:

Router# show diag 3

Slot 3:

Ethernet port adapter, 4 ports

Integrated port adapter is analyzed

EEPROM contents at hardware discovery:

Hardware revision 255.255 Board revision UNKNOWN

EEPROM format version 1

EEPROM contents (hex):

0x20:01 D3 FF FF FF FF FF FF FF FF FF FF FF FF FF FF

0x30:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Note To use the show diag command with the Cisco 7140 series router, replace the slot argument 3 with 4.

Cisco 7200 Series and Cisco uBR7200 Series

Following is an example of the show diagslot command that shows a PA-4E in port adapter slot 1 of a Cisco 7200 series router:

Router# show diag 1

Slot 1:

Ethernet port adapter, 4 ports

Port adapter is analyzed

Port adapter insertion time 2d09h ago

Hardware revision 1.14 Board revision A0

Serial number 4294967295 Part number 73-1556-04

Test history 0x0 RMA number 00-00-00

EEPROM format version 1

EEPROM contents (hex):

0x20:01 02 01 0E FF FF FF FF 49 06 14 04 00 00 00 00

0x30:50 00 00 00 FF FF FF FF FF FF FF FF FF FF FF FF

Note Port adapters used with Cisco 7200 VXR and Cisco uBR7246 VXR routers require the correct base hardware revision in order to function. The following error message occurs on bootup if the incorrect hardware revision is used:

Cisco 7401ASR Routers

Following is an example of the show diagslot command that shows a PA-4E in port adapter slot 1 of a Cisco 7401ASR router:

Router# show diag 1

Slot 1:

Ethernet port adapter, 4 ports

Port adapter is analyzed

Port adapter insertion time 2d09h ago

Hardware revision 1.14 Board revision A0

Serial number 4294967295 Part number 73-1556-04

Test history 0x0 RMA number 00-00-00

EEPROM format version 1

EEPROM contents (hex):

0x20:01 02 01 0E FF FF FF FF 49 06 14 04 00 00 00 00

0x30:50 00 00 00 FF FF FF FF FF FF FF FF FF FF FF FF

VIP in Cisco 7000 Series and Cisco 7500 Series Routers

Following is an example of the show diag slot command that shows a PA-4E in port adapter slot 11:

Router# show diag 11

Slot 11:

Physical slot 11, ~physical slot 0x4, logical slot 11, CBus 0

Microcode Status 0xC

Master Enable, LED, WCS Loaded

Board is analyzed

Pending I/O Status: Console I/O

EEPROM format version 1

VIP2 controller, HW rev 2.2, board revision UNKNOWN

Serial number: 03507967 Part number: 73-1684-02

Test history: 0x00 RMA number: 00-00-00

Flags: cisco 7000 board; 7500 compatible

EEPROM contents (hex):

0x20: 01 15 02 02 00 35 86 FF 49 06 94 02 00 00 00 00

0x30: 12 2B 00 2A 1A 00 00 00 00 00 00 00 00 00 00 00

Slot database information:

Flags: 0x4 Insertion time: 0x3E50 (6d14h ago)

Controller Memory Size: 8 MBytes

PA Bay 1 Information:

Ethernet PA, 4 ports

EEPROM format version 1

HW rev 1.0, Board revision 160

Serial number: 02023164 Part number: 73-1556-03

Using the show interfaces Command

The show interfaces command displays status information (including the physical slot and interface address) for the interfaces you specify. All of the examples that follow specify ethernet interfaces.

For complete descriptions of interface subcommands and the configuration options available for Catalyst RSM/VIP2, Cisco 7100 series, Cisco 7200 series, Cisco uBR7200 series, Cisco 7301 routers, Cisco 7401ASR routers, and VIP interfaces, refer to the publications listed in the "Related Documentation" section on page viii. The following examples show output for the show interfaces command on some of the platforms that support the PA-4E.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

Catalyst RSM/VIP2 show interfaces Command

In these examples, the four ethernet interfaces (0 to 3) are on a port adapter in port adapter slot 0 of a Catalyst RSM/VIP2; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

Cisco 7100 Series Routers

Following is an example of the show interfaces command used with a Cisco 7120 series router and a Cisco 7140 series router.

In this example the four ethernet interfaces (0 to 3) are on a port adapter in port adapter slot 3 of a Cisco 7120 series router; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

Note To use the show interfaces ethernet command with the Cisco 7140 series router, replace the interface address argument 3/0 with 4/0.

Cisco 7200 Series and Cisco uBR7200 Series show interfaces Command

Following is an example of the show interfaces command for Cisco 7200 series and Cisco uBR7200 series routers. In this example, the four Ethernet interfaces (0 to 3) are in port adapter slot 2; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

VIP in Cisco 7000 Series or Cisco 7500 Series Routers

Following is an example of how the show interfaces command used with the VIP. In this example, the four Ethernet 10BaseT interfaces (0 to 3) are on a port adapter in port adapter slot 0 of a VIP in interface processor slot 3; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

Following is an example of the show interfaces ethernet command, which shows all of the information specific to interface 0 on a port adapter in port adapter slot 1 of a VIP2 in interface processor slot 3:

Using the ping Command to Verify Network Connectivity

The ping command allows you to verify that an interface port is functioning properly. This section provides brief descriptions of this command. Refer to the publications listed in the "Related Documentation" section on page viii for detailed command descriptions and examples.

The ping command sends echo request packets out to a remote device at an IP address that you specify. After sending an echo request. the system waits a specified time for the remote device to reply. Each echo reply is displayed as an exclamation point (!) on the console terminal; each request that is not returned before the specified timeout is displayed as a period (.). A series of exclamation points (!!!!!) indicates a good connection; a series of periods (.....) or the messages [timed out] or [failed] indicate a bad connection.

Following is an example of a successful ping command to a remote server with the address 10.0.0.10:

Using loopback Commands

With the loopback test, you can detect and isolate equipment malfunctions by testing the connection between the PA-4E interface and a remote device such as a modem or a CSU/DSU. The loopback subcommand places an interface in loopback mode, which enables test packets that are generated from the ping command to loop through a remote device or compact serial cable. If the packets complete the loop, the connection is good. If not, you can isolate a fault to the remote device or compact serial cable in the path of the loopback test.

Depending on the mode of the port, issuing the loopback command checks the following path:

•When no compact serial cable is attached to the PA-4E interface port, or if a DCE cable is attached to a port that is configured as line protocol up, the loopback command tests the path between the network processing engine and the interface port only (without leaving the network processing engine and port adapter).

•When a DTE cable is attached to the port, the loopback command tests the path between the network processing engine and the near (network processing engine) side of the DSU or modem to test the PA-4E interface and compact serial cable.